A lot of good points have been mentioned here regarding the downsides of renting out your car. I'll add a more generic one: "can of worms" resistance. In othe

A lot of good points have been mentioned here regarding the downsides of renting out your car. I'll add a more generic one: "can of worms" resistance. In other words, I'd probably shy away from using this service because there's a small chance it might turn into a hassle due to damage, tickets, or whatever else. Even if Flightcar adequately covers these costs, there is a non-trivial amount of hassle in the redemption thereof. If the flightcars are listening: it's worth figuring out some way to counter this resistance... As a side note, this is also the reason that I normally buy insurance from rental car companies even when my credit card already covers rentals as a perk. I've used that perk in the past and then had to make a claim; getting the whole thing approved and paid out was an exercise in paper pushing. Never again.